how to downgrade to any ios FROM any ios

this should work
its really simple
you will need
saved shsh blobs for ios
an ios firmware file that matches the blobs
latest version of redsn0w

Step 1: Enter dfu mode

there are many instructions on the web and redsnow has some

Comments

[amandaghassaei]

why would you want to downgrade?

[The nerdling]

my iphone 3gs had ios 5.1.1 on it and it was slow, when i had 4.1 on it, it was fast sooo downgrades